Annals of the Association of American Geographers
Whitmore, Thomas M. and B.L. Turner II. "Landscapes of Cultivation in Mesoamerica on the Eve of the Conquest". 82:3. The Americas Before and After 1492: Current Geographical Research (1992), 402-425.

The Founder of TU would like to thank many individuals without whom Tobacconist University® would not exist: Starting with my faimily; J.O.P., the greatest cigar maker and mentor I have ever known; Every Tobacconist, good and bad, that I have ever met; Immense gratitude goes to every Certified Tobacconist (past and present) who has contributed to the content of this course and their own, as well as the public’s education; And finally, to the thousands of customers and luxury tobacco lovers who teach and challenge us every day.